Features and Benefits of HSG80 ACS 8.6P Data Replication Manager

Features and Benefits of HSG80 ACS 8.6P Data Replication Manager 13
Due to limitations in the OSG, a DRM over ATM solution is limited to what can be connected to
the available 14 ports on each of the four 16-port switches. The following options are based on
one port per HBA pair and two ports per HSG80 pair per switch.
Six storage arrays and 2 servers
Five storage arrays and 4 servers
Four storage arrays and 6 servers
Three storage arrays and 8 servers
Two storage arrays and 10 servers
One storage array and 12 servers
As new FC-to-ATM gateways become available, support for larger DRM over ATM solutions
should also become available.
DRM over ATM and the FC-to-ATM gateway support intersite link speeds ranging from
1.54 Mb/sec to 155 Mb/sec. The default connection for the gateway is 155 Mb/sec with
multimode fiber. The use of another intersite connection type or speed requires the use of an
ATM switch that interfaces the OC3 multimode output of the gateway into whatever is used for
the intersite link. For example, if a pair of classic T1 or E1 intersite links are used, then the ATM
switch must support the physical interfaces and data rates of both OC3 and T1 or E1.
DRM over ATM also supports the use of external ATM data encryption devices allowing use of
DRM over public ATM networks without concern that the data may be compromised. For more
information on the DRM over FC-to-ATM configuration, refer to the Compaq Data Replication
Manager over an ATM Link Application Note at
www.compaq.com/products/sanworks/drm/documentation.html
Host A
Host B
Host V
Host W
Switch D
FC/ATM
Bridge
Target
Initiator
FC/ATM
Bridge
FC/ATM
Bridge
FC/ATM
Bridge
Switch Y
Switch E Switch Z
Figure 6: Extended DRM over ATM configuration
Extended DRM over IP Configuration
The extended DRM over IP configuration is similar to the simple DRM configuration except for
the use of FC-to-IP gateways. As shown in Figure 7, two FC-to-IP gateways are required at each
site, one for each fabric.